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Not clear what you mean...... are you talking about the EATC dignostics? O2 heaters?
 

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Discussion Starter · #3 ·
I read on here where someone wasn't getting heat in the passenger compartment and they ran a test to see what codes came up, the code he
got was something about the blend door. Was wondering how to run the test as I have no heat.
 

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Discussion Starter · #7 ·
yes, cold air in every position, I replaced the dash console with the radio and heat controls and had great heat for one day, then back the same thing cold.
 

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yes, cold air in every position, I replaced the dash console with the radio and heat controls and had great heat for one day, then back the same thing cold.
Easy to check, blend door motor.

Empty the glove box.
Pinch the sides toward the center and the door should open way down.
Inside and to the left and down you should see the blend door motor.
See pic, but yours should be white for manual control.
Key on, not started.
Turn your control to either side and watch the shaft.
Shaft is shown at the top of the motor, and see square hole.
As you trun your temp knob side to side, the shaft should follow.
It is slow to follow, maybe 12 seconds from one side to the other.
Turns 90 degrees.

If it does not move, your most likely cause is bad motor.

Held in place by 4 screws = 8mm = 5/16"

Should access by removing the control panel.

Frist principle. Check the easy things first.

Motor is a common fail item.

-chart-
 

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On a 99, easiest access is to slide the football (radio/hvac controls) out with din keys (ford radio removal tools) available at parts stores or walmart for ~$5.
 

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Discussion Starter · #10 ·
Thanks for the replies, I have had the football out but didn't think to try putting the key on and looking at the blend door actuator to see if it moves. Will try that tomorrow.
 

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If you detect clicking or thumping when activating the bda, you can rest assured some plastic gear teeth are broken off inside the case.
 
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